update method

@override void update(double deltaSeconds)

Called once per frame while the component is mounted, enabled, and loaded. deltaSeconds is the elapsed time since the previous tick. A traversal visits each component at most once. Removing this component or an earlier sibling is safe. A component inserted before the current traversal position starts on the next frame. Reordering component or child lists during traversal is unsupported.

Implementation

@override
void update(double deltaSeconds) {
  final base =
      followTarget?.globalTransform.getTranslation() ?? Vector3.zero();
  final lookAt = base + Vector3(0.0, lookHeight, 0.0);
  final desired = _desiredPosition(lookAt);
  if (!_initialized) {
    _position.setFrom(desired);
    _target.setFrom(lookAt);
    _initialized = true;
  } else {
    final r = smoothingResponse(clampDeltaSeconds(deltaSeconds));
    _position.addScaled(desired - _position, r);
    _target.addScaled(lookAt - _target, r);
  }
  node.lookAtFrom(_position, _target);
}